Hi all, my two share a big litter tray filled with some wood pellet litter from Tesco (they also use our garden if the weather is good). To avoid ammonia smells I'm finding I need to clear the tray out every 1-2 days. It all gets tipped into a bin bag and put in the black bin. Does anyone have any more eco-friendly suggestions (I am trying to reduce plastic/landfill waste where I can).